C Multiple Indirection

This section illustrates you the concept of Multiple
Indirection.

C permits the pointer to point to another pointer.
This creates many layers of pointer and therefore called as multiple
indirection. A pointer to a pointer has declaration is similar to
that of a normal pointer but have more asterisk sign before them. This indicates
the depth of the pointer. You can see in the given example, we have declared an
integer variable i initialized to 100. The statement int ** pt creates a
pointer which points to pointer to a variable with int value. We
have passed the value of i to pointer pt2 and to pass the value of pt2
to pt1, we have used the statement pt1 = &pt2; which shows the
Multiple Indirection.